It appears that SmugMug may be headed toward more support for interacting with Lightroom over Aperture. I'm an Aperture user but love SmugMug. Do I need to switch to Lightroom?
We're huge Apple and Adobe fans over here at SmugMug. For better or worse, though, Adobe has been excited to work with us to support Lightroom (and Photoshop and Photoshop Elements), while Apple hasn't been eager to work with us on either Aperture or iPhoto so far.
We have a good relationship with Apple, so this certainly isn't some sort of problem between our companies, but for whatever reason, Apple hasn't felt like it should be a big priority for them. We'd love to see that change.
Your best bet is probably to (politely!) let them know which product(s) you'd like to see better SmugMug integration via their feedback forms: